#region Copyright (C) 2007 Jens Winter

//Copyright (C) 2007 Jens Winter

//This library is free software; you can redistribute it and/or
//modify it under the terms of the GNU Lesser General Public
//License as published by the Free Software Foundation; either
//version 2.1 of the License, or (at your option) any later version.

//This library is distributed in the hope that it will be useful,
//but WITHOUT ANY WARRANTY; without even the implied warranty of
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
//Lesser General Public License for more details.

//You should have received a copy of the GNU Lesser General Public
//License along with this library; if not, write to the Free Software
//Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

#endregion

using System;
using System.Data;
using Flynn.Core.ActivityResults;

namespace Flynn.Core.Activities
{
    public class FilterAndExecuteUpdatesActivity : IFilterAndExecuteUpdatesActivity
    {
        private readonly IFilterUpdatesActivity _filterUpdatesActivity;
        private readonly IExecuteUpdatesActivity _executeUpdatesActivity;

        public FilterAndExecuteUpdatesActivity(IFilterUpdatesActivity filterUpdatesActivity, IExecuteUpdatesActivity executeUpdatesActivity)
        {
            if (filterUpdatesActivity == null)
                throw new ArgumentNullException("filterUpdatesActivity");

            if (executeUpdatesActivity == null)
                throw new ArgumentNullException("executeUpdatesActivity");

            _filterUpdatesActivity = filterUpdatesActivity;
            _executeUpdatesActivity = executeUpdatesActivity;
        }

        public FilterAndExecuteUpdatesResult FilterAndExecuteUpdates(Project project, string currentVersion, string targetVersion, IDbConnection connection)
        {
            if (project == null)
                throw new ArgumentNullException("project");

            if (connection == null)
                throw new ArgumentNullException("connection");

            try
            {
                FilterUpdatesResult filterUpdatesResult = _filterUpdatesActivity.FilterUpdates(project, currentVersion, targetVersion);
                if (filterUpdatesResult.Failed)
                    return FilterAndExecuteUpdatesResult.Failure(filterUpdatesResult.FailureMessage);

                ExecuteUpdatesResult executeUpdatesResult = _executeUpdatesActivity.ExecuteUpdates(filterUpdatesResult.FilteredUpdates, connection);
                if (executeUpdatesResult.Failed)
                    return FilterAndExecuteUpdatesResult.Failure(executeUpdatesResult.FailureMessage);

                return FilterAndExecuteUpdatesResult.Success(filterUpdatesResult.FilteredUpdates);
            }
            catch (Exception e)
            {
                return FilterAndExecuteUpdatesResult.Failure(e.Message);
            }
        }
    }
}